Granted Patent
Utility
US 4,826,721 · App. 07/053,869
Laminated materials of pretreated fibre material and vulcanization products of hydrogenated nitrile rubber
Inventors:
Werner Obrecht, John Goossens, Jean Mirza, Jurgen Pabst, Joachim Thormer, Zsolt Szentivanyi
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: May 26, 1987
Inventors
Werner Obrecht
John Goossens
Jean Mirza
Jurgen Pabst
Joachim Thormer
Zsolt Szentivanyi
Assignee (at issue)
Bayer Aktiengesellschaft
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.